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  1. Black holes grow by consuming matter, a process scientists call accretion, and by merging with other black holes. A stellar-mass black hole paired with a star may pull gas from it, and a supermassive black hole does the same from stars that stray too close.

  2. NASA's home for exploring everything beyond our solar system. Scientists use our fleet of telescopes to help us understand objects from our nearest neighbor stars, to monster black holes and distant galaxies.

  3. Black holes can be surrounded by rings of gas and dust, called accretion disks, that emit light across many wavelengths, including X-rays. A supermassive black hole’s intense gravity can cause stars to orbit around it in a particular way.

  4. 27 Οκτ 2015 · This diagram shows how a shifting feature, called a corona, can create a flare of X-rays around a black hole. The corona (feature represented in purplish colors) gathers inward (left), becoming brighter, before shooting away from the black hole (middle and right).

  5. www.nasa.gov › universe › what-are-black-holesWhat Are Black Holes? - NASA

    8 Σεπ 2020 · A black hole is an astronomical object with a gravitational pull so strong that nothing, not even light, can escape it. A black hole’s “surface,” called its event horizon, defines the boundary where the velocity needed to escape exceeds the speed of light, which is the speed limit of the cosmos.

  6. This handy dandy field guide covers basic black hole anatomy, how to find black holes, as well as different black hole types! Never go to space without it!

  7. 2 Μαΐ 2022 · This visualization shows 22 X-ray binaries in our Milky Way galaxy and its nearest neighbor, the Large Magellanic Cloud, that host confirmed stellar-mass black holes. The systems appear at the same physical scale, demonstrating their diversity.

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